Brazing compound.



No. 777,547. Patented December 13, 1904.

UNITED STATES PATENT OFFICE.

LEIGH ROY SCHAAP, OF LOVELAND, COLORADO, ASSTGNOR TO THE N. TIONAL BRAZING COMPOUND COMPANY, OF DENVER, COLORADO.

BRAZING COMPOUND" SPECIFICATION forming part of Letters Patent No. 777,547, dated December 13, 1904. Application filed July 28, 190%. Serial No. 214,538. (No specimens.)

1077/07" it y 0077/0611": the following proportions of the various ele- Be itknown thatLLEIen ROY SoHAAna citiments: prussiate of potash, two ounces; plaszen of the United States, residing at Loveland, ter-of-paris, two ounces; wood-charcoal, onccounty of Larimer, and State of Colorado, half ounce; citric acid, one ounce; boraX, two 5 have invented acertain new and useful Brazing ounces. These elements are ground to a pow- 5 Compound; and I do declare the following to der and mixed to form a homogeneous com be a full, clear, and exact description of the inpound. vention, such as will enable others skilled in In using, the two metal parts to be brazed the art to which it appertains to make and use or connected are first raised to a brazing heat IO the same. in any suitable manner. The compound in 55 My invention relates to a composition of the form of a powder is then applied to the matter to be used for brazing purposes, being joint or division where the two parts are to adapted for use in brazing or joining metal be united. The flux or brazing metal, as parts which heretofore have been considered brass, is then applied to the joint and being impossible or difficult to unite in this manner. melted by the heat passes between the two 60 By the use of my improved compound I am parts to be connected. The prussiatc of potenabled to satisfactorily braze cast-iron, aluash prepares the parts for the proper perminiuln, and copper, as well as other metals. formance of the brazing function.

Cast-iron, aluminium, and copper are impos- Having thus described my invention, what sible to braze by the use of ordinary brazing I claim 1s- 5 compounds; but by the use of my lmprove- 1. Abrazingeompoundconsistingoiprussiment the work may be quickly and satisfacate of potash, plaster-of-paris, wood-charcoal, torily accomplished. The compound is not citric acid and bore); combined in suitable proonly adapted for use for brazing purposes, portions.

2 5 but also for tempering, welding, and harden- 2. The herein-described composition of mat- 7 ing metals as well. I ter consisting of prussiate of potash two My improved compound consists of prussiounces; plaster-of-paris two ounces; wood ate of potash, plasterof-paris, wood-charcoal, charcoal one-half ounce; citric acid one ounce; and citric acid in combination with borax or and borax two ounces.

3o borac1cac1d. lheterm prussiateofpotash 3. A brazmg compound consisting oi yol- 75 as above employed is intended to include both low prussiate of potash, plaster-of-paris, woodyellow pruss1ateofpotashand redprussicharcoal, citric acid and borax combined in ate of potash. These are the terms commonly suitable proportions. employed when referring to these ingredients. 4. The herein-described composition of mat- The more accurate or technical terms, howter consisting of yellow prussiate of potash 80 ever, are potassium ferrocyanid for the two ounces; plaster-of-paris two ounces, woodyellow prussiate of potash and potassium charcoal one-half ounce; citric acid one ounce;

'ferricyanid for the red prussiate of potash. and boraX two ounces. Whenever the term prussiate of potash is In testimony whereoi I afiix my signature in 4 used in this specification, it must be considpresence of two witnesses.

ered to include both the yellow and red spe- 7 r w cies. The yellow prussiate of potash or po- LEIGH R01 MJHAAP' tassium ferrocyanid, however, is preferred. Witnesses:

While I do not limit the invention to exact DENA NELSON,

proportions, good results are obtained by using A. J. OBRIEN. 

